It also is used to treat and prevent disseminated Mycobacterium avium complex (MAC) infection [a type of lung infection that often affects people with human immunodeficiency virus (HIV)]. It is used in combination with other medications to eliminate H. pylori, a bacteria that causes ulcers.

It also is used sometimes to treat other types of infections including Lyme disease (an infection that may develop after a person is bitten by a tick), crypotosporidiosis (an infection that causes diarrhea), cat scratch disease (an infection that may develop after a person is bitten or scratched by a cat), Legionnaires' disease (a type of lung infection), and pertussis (whooping cough; a serious infection that can cause severe coughing). It is also sometimes used to prevent heart infection in patients having dental or other procedures.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Biaxin works by stopping the growth of or killing sensitive bacteria by interfering with their protein synthesis.